Previous Year Questions

Option (a): Interchanging 116 and 92

92 - 116 ÷ 4 + 25 X 2 - 20 = 150

92 - 29 + 25 X 2 - 20 = 150

92 - 29 + 50 - 20 = 150

92 + 21 - 20 = 150

113 - 20 = 150

93 ≠ 150

LHS is not equal to RHS.

So, option (a) is incorrect.

Option (b): Interchanging 25 and 20

116 - 92 ÷ 4 + 20 X 2 - 25 = 150

116 - 23 + 20 X 2 - 25 = 150

116 - 23 + 40 - 25 = 150

116 + 17 - 25 = 150

133 - 25 = 150

108 ≠ 150

LHS is not equal to RHS.

So, option (b) is incorrect.

Option (a: Interchanging 2 and 4

116 - 92 ÷ 2 + 25 X 4 - 20 = 150

116 - 46 + 25 X 4 - 20 = 150

116 - 46 + 100 - 20 = 150

116 + 54 - 20 = 150

170 - 20 = 150

150 = 150

LHS is equal to RHS.

So, option (c) is correct.

Option (d): Interchanging 20 and 92

116 - 20 ÷ 4 + 25 X 2 - 92 = 150

116 - 5 + 25 X 2 - 92 = 150

116 - 5 + 50 - 92 = 150

116 + 45 - 92 = 150

161 - 92 = 150

69 ≠ 150

LHS is not equal to RHS.

So, option (d) is incorrect.